I am in the process of upgrading my sierra cosowrth and have hit a choice when it comes to turbo ?

i would like it to make over 420 bhp and retain the original 4x4 exhaust manifold what turbo would be suitable i do not wont to go external wastegate

T34 .63 WOULD BE FLAT OUT RISKY???
T38 ???

thanks

 

No chance on a T34.63.

Im sure you could get a T38 so it suits a 4x4 manifold.

Steve

 

r/b t38 or gt30

 

rb motorsport t38 ? then this will fit original manifold ??

thanks

 

Think he's referring to Roller Bearing r/b.
Think very seriously about gearbox life, in 4wd at that level, could well be an issue.
tabetha

 

Quaife box and diffs so they should be ok as long as i am sensible!!!!!

 

phone aet turbos as they sell a gt30 internaly gated turbo kit thats direct bolt on for £1295 and its rated to 450bhp....

then sell your turbo for a few hundred.... job done the roller bearings are the best turbo ive ever experienced mate